R语言 错误：您是否拼错了`ggplot()`中的`data`参数[已关闭]这可能是因为您的data.frame的实际名称不是df，或者您在全局环境中创建了一个df变量，而不是在夸托环境中。注意，使用df作为data.frame的名称并不是一个好主意，因为df()是R中用于F分布密度的内置函数（因此使用函数的错误）。如果代码仅在编译时出错
you will get the error Error: cannot modify grouping variable. If you get this error, use the ungroup function to remove grouping within a data frame, and then you will be able to mutate any of the variables in the data.
Likewise, note that function and method names in Python are case sensitive and must be spelled correctly. If we run a series tests on your code to check your implementation of a function named some_function, but you have defined Some_Function instead, it will appear that your function is mi...
Definition 2. A coloring of a graph G consist in assigning a number (or a color) to each node, with the restriction that any two nodes that have an edge in between cannot be assigned the same number (or color). Definition 3. The chromatic number of a graph is k ∈ N if there exi...
- a declaration of originality (PDF). When one of the items is missing, the exam will be failed. This also holds if the .Rmd cannot be compiled. 6. Enter your complete name and your student ID into the header of the supplied template. The template ...
: Assignments emailed instead of submitted by the online submission on MyUni will not be marked and will receive zero. : Have you checked that the assignment submitted is the correct one, as we cannot accept other submissions after the due date?
# -A: 0, X轴标签选择0度 # -C: 自定义颜色,注意引号的使用,最外层引号与内层引号不同,引号之间无交叉 # -T: 指定给定的颜色的类型;如果给的是vector (如下面的例子), 则-T需要指定为vector; 否则结果会很怪异,只有俩颜色。 # -t: 指定图形的题目,注意引号的使用;参数中包含空格或特殊字符等都要用...
if(var.max > dim(var.mat)[2]){stop('var.max cannot be larger than the number of variables (columns) in var.mat')} require(vegan) combn.sum <- sum(factorial(ncol(var.mat))/(factorial(1:var.max)*factorial(ncol(var.mat)-1:var.max))) ...
R语言 错误：您是否拼错了`ggplot()`中的`data`参数[已关闭]这可能是因为您的data.frame的实际名称不...
or the typed notes, the reference must be cited in an appendix called “References”. The important aspect of assignments is that what is written must be in the words of the student, and that the solution must be unique; it cannot be a straight copy of ...